P87LPC762BD NXP Semiconductors, P87LPC762BD Datasheet - Page 26

• Manufacturer Part Number: P87LPC762BD
• Description: MCU 8-Bit 87LP 80C51 CISC 2KB EPROM 5V 20-Pin SO Tube
• Manufacturer: NXP Semiconductors

Specifications of P87LPC762BD

• Package: 20SO
• Device Core: 80C51
• Family Name: 87LP
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 18
• Interface Type: I2C/UART
• Number Of Timers: 2
• Ram Size: 128 Byte
• Program Memory Size: 2 KB
• Program Memory Type: EPROM
• Operating Temperature: 0 to 70 °C

Philips Semiconductors
2001 Oct 26
Low power, low price, low pin count (20 pin)
microcontroller with 2 kbyte OTP
THE OSCILLATOR MUST BE CONFIGURED IN ONE OF
THE FOLLOWING MODES:
– LOW FREQUENCY CRYSTAL
– MEDIUM FREQUENCY CRYSTAL
– HIGH FREQUENCY CRYSTAL
CAPACITOR VALUES MAY BE OPTIMIZED FOR
DIFFERENT OSCILLATOR FREQUENCIES (SEE TEXT)
THE OSCILLATOR MUST BE CONFIGURED IN
THE EXTERNAL CLOCK INPUT MODE.
A CLOCK OUTPUT MAY BE OBTAINED ON
THE X2 PIN BY SETTING THE ENCLK BIT IN
THE P2M1 REGISTER.
A SERIES RESISTOR MAY BE REQUIRED IN ORDER TO
LIMIT CRYSTAL DRIVE LEVELS. THIS IS PARTICULARLY
IMPORTANT FOR LOW FREQUENCY CRYSTALS (SEE TEXT).
Figure 17. Using an External Clock Input
Figure 16. Using the Crystal Oscillator
CMOS COMPATIBLE EXTERNAL
OSCILLATOR SIGNAL
CERAMIC RESONATOR
QUARTZ CRYSTAL OR
23
X1
X2
87LPC762
*
SU01225
X1
X2
87LPC762
87LPC762
SU01224
Preliminary data